James s



'attainable by JAMEs'sDnowN, l o r LUoIAN sun-arnet* PROVIDENCE, RHODEISLAND. l A

or In-iwaUcKi-ifr, Assio'non To Josnrn'n; snows AND lMPnovEs/IENT 1|-Florien-morenas.

Specification forming part of Lettera Patent No'. d 2,525,1datedApril1864. Y

To all whom it'may concern-" Be itI known' that yI, JAMES S. BROWN, of

Pawtucket, in the county of Providence and.

State of Rhode Island, have invented a new and useful improvement'in thefrictionclutch for. connecting and disconnecting a loose pulley with orfrom its shaft or axle and for other purposes t and I do hereby declarethat thefollowing is a frh-clear, and'exact' description of the same,reference'being had to the accompanying drawings, making part of. thisspeciiicatiomin whicht Figure lis a transverse section of my improvedfriction-clutch and pulley, arranged in proper forni on a shaft, B. Fig.2 isa view of the interior' face of the segment-plate D, Fig.

sponding parts in all the iigures. My'improvement consists in a peculiarar` rangement of the levers and 'segmentsofa' rietion-cluteh, whereby`the construction is greatly simplified and rendered more substantial,and a. more direct and forcible pressure against the friction-surface,and consequently.

a greater olu,l nhing force, is obtained than is iifterently-arran gedfrictionclutches hereton` erknown and'used.

To enable others skilled in the art to make and use myvinvention, l willproceed to describe the same.

"-- In the accompany-'ingdrawings B is a shaft and P-is a pulleythereon, having a suitable lengthof hub to give it steadiness upon theshaft, and 'having the rimY P formed almost wholly upon one side ofthe'plate or arms m,

the interior circular surface of which' (rim) is turned to a smoothbearing for the clutching device, which consists of two segments, E E,of form as shown in Figs. 1, 2, 'and 4, sliding freely inthe guides U C,formedin the segment-plate D, Figs. 2 and 3, by means of two straightlevers, G G, Figs'. l, 6, and l', swinging upon two fulcrum-pins, d d,in the lugs g g of the segment-plate, and passing through and exertingtheir force against the edge of the openings l l,in sliding plates ofthesegments E E, at a point on the levers near" the i'ulcrum-pins, bymotion and power appliedto the'opposite ends ofthe said levers throughthe medium of the sliding wedge-collar F upon theshaft. .The saidsegments E are connected by means of two spiralsprings, s s, attached tobooks t t upon each side thereof, as shown -inFg. 2, in order todraweach segment toward the center and from contact with the inner surfaceof the wheel-rim 'at the proper time. A set-screw, it, is inserted inthe long* arm of the levers G to adjust'and regulate the sliding'movement of thetwo segments and their consequent pressure against thefrictionsurface on the wheel-rim, the wedge'collaroperatingA against theheads of such set-screws.

The pulley P, as represented, -is intended to turn freely on the shaft Band is held Ain its position under suchcircumstances by the iixedcollarr on one side and .the segmentplate D made fastto the shaft by theset- -screw la., through its hub, as seen in Fig. 3,

upon the other' side, whereby the parts composing the' clutch aresecured tol and revolve Vwith the shaft. y

The wedge collar F is formed with two 'wedges or conical ends to operatea. frictionclutch upon both sides and with a deep score, j, in themiddle for the reception of the forked shipper, which is generally used.to slide iteither way upon the shaft.

When the cone or circular wedge is slid between the set-screws z'z' inthe ends of the levers G the segments E are pressed from the centerdirectly against the under side ofthe wheel-rim, and when the said coneor wedge is slid from between the said set-screws they reaction ofthesprings s s withdraws. the seg-l ments from contact with the rim of thewheel,

fitted` up with Vthe 'commonest tools by any ordinary machinest.

It will also be seen that the segments have l a. direct action andpressure at rightangles with the shaft against thc under surface of;"the wheel-rim, whereby any wear upon the friction-surface of saidsegments is calculated l I am aware also that a similar wedge-collar totit the same more closelyand perfectly to the surface of the wheel-rim,and thus te insure a more perfect and forcible clutching action than canpossibly' be attained by an obliquel or other, movement of the saidsegments that is less direct; and itwill be seen that the arrangement ofthe levers G with the segments is such that a sufficient slidingmovement is imparted to the-'said segments from a. point on the lever atabout a quarter of the distance ot' its length from the t'ulcrnnrpin (l,so that the power exerted upon the long arm ot' the segments, whichchiefly distinguishes my iu- \ention from other arrangen'lents whichhave been heretofore employed for this purpose."

I am aware that similar segments, counected byvtoggles with a slidingsleeve and snrroumleder encompassed by au endless .spiral spring towithdraw the segu'lents from eontact with the \vheelrim, have beenpreviously patented by Vendell Wright, June 15, lt`52, and I would not,therefore, be understood as elaiming the segments when so arranged.

for operating two levers or clamps to' clutch the Vedge of a disk'orycollar has been previously `patented by- Francis A. Pratt, Sep tember4, 1860, and I would not, therefore, be understood as claiming` suchwedge-collar or the arrangement of parts therein set forth.'

I am aware, too, that the said wedge-collar, in combination with twoangular levers, the action ot which is adapted to the rimA et' thepulley, has been previously patented by the said Francis A. Pratt,November 26, 1861, and I would not, therefore, be understood as claimingsuch combination, as neither this or the other arrangements ofthesaidPratt and Wright, above referred to, are eapableot' produein g thedesirable results herein described as peculiar to my improvedarrangement.

Having thus .described my invention, what I claim, and desire to secureby Letters Pat ent, is-

The combination and arrangement of the segments ll E,the segment-plateD, and levers GG, with the Wedge-eollar F and pulley P, substantially asdescribed, for the purpose specified. l

.IA-nies s. BROWN.

Witnesses:

Unas. A. WARLAND, Tiros'. K. KING."

